Linux TimeZones Setting

Question :   During the daily standup, it was pointed out that the timezone across Nautilus Application Servers in Stratos Datacenter doesn't match with that of the local datacenter's timezone, which is America/Blanc-Sablon.

Please Note :-  Perform the below commands based on your question  server,  user name & other details might differ . So please read task carefully before executing. All the Best 👍

Solution:  

1. At first login on App server   &  Switch to  root user 

thor@jump_host ~$ ssh tony@stapp01 The authenticity of host 'stapp01 (172.16.238.10)' can't be established. ECDSA key fingerprint is SHA256:2DbVbI7xvrQSSIOQD502dx7BHfADaJEecTxNIX/MmQs. ECDSA key fingerprint is MD5:c6:8e:51:2e:28:dd:bd:cc:e4:b6:b5:c4:d3:dc:13:e6. Are you sure you want to continue connecting (yes/no)? yes Warning: Permanently added 'stapp01,172.16.238.10' (ECDSA) to the list of known hosts. tony@stapp01's password:  [tony@stapp01 ~]$ sudo su -  We trust you have received the usual lecture from the local System Administrator. It usually boils down to these three things:      #1) Respect the privacy of others.     #2) Think before you type.     #3) With great power comes great responsibility.  [sudo] password for tony: [root@stapp01 ~]#

 2. Run Below command to  check existing Time Zone set for server

[root@stapp01 ~]# timedatectl       Local time: Sat 2021-06-12 15:22:41 UTC   Universal time: Sat 2021-06-12 15:22:41 UTC         RTC time: n/a        Time zone: UTC (UTC, +0000)      NTP enabled: n/a NTP synchronized: yes  RTC in local TZ: no       DST active: n/a [root@stapp01 ~]#

 3. Help give you syntax to set the time zone & others

[root@stapp01 ~]# timedatectl -h timedatectl [OPTIONS...] COMMAND ...   Query or change system time and date settings.     -h --help                Show this help message      --version             Show package version      --no-pager            Do not pipe output into a pager      --no-ask-password     Do not prompt for password   -H --host=[USER@]HOST    Operate on remote host   -M --machine=CONTAINER   Operate on local container      --adjust-system-clock Adjust system clock when changing local RTC mode   Commands:   status                   Show current time settings   set-time TIME            Set system time   set-timezone ZONE        Set system time zone   list-timezones           Show known time zones   set-local-rtc BOOL       Control whether RTC is in local time   set-ntp BOOL             Control whether NTP is enabled [root@stapp01 ~]#

 

 4. Run Below command to set the time zone  & verify it 

[root@stapp01 ~]# timedatectl set-timezone America/Blanc-Sablon    [root@stapp01 ~]# timedatectl       Local time: Sat 2021-06-12 11:25:38 AST   Universal time: Sat 2021-06-12 15:25:38 UTC         RTC time: n/a        Time zone: America/Blanc-Sablon (AST, -0400)      NTP enabled: n/a NTP synchronized: yes  RTC in local TZ: no       DST active: n/a [root@stapp01 ~]#

Please Note :- You have to do this in all app servers stapp01,stapp02, stapp03. I have Shown only for Stapp01 

5.  Click on Finish & Confirm to complete the task successful

Happy Learning!!!!

Apart from this if you need more clarity,  I have made a  tutorial video on this , please go through and share your comments. Like and share the knowledge